SPP Pumps Auto Prime - High Flow Range XF300 & 400 - Manual (Page 12)

Manual No/Rev
W77-009E / 2
Operators Instructions for
XF300 & XF400 Range Centrifugal Pumps
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 12 of 23
d) Initial Lubrication:
Oil chambers on these pumps are emptied
for transport and must be filled with the
specified oil to the required level prior to
running. After the first 50 hours of
operation, drain off a sample and check for
any oil contamination. If any contamination
is found, the oil is to be changed.
6.5 Impeller Inspection
The pump casing volute is fitted with a
removable cover to allow limited visual
inspection only of the pump internals.
Ensure that the pump prevented from
starting and that the volute has been
drained before removing the inspection
cover.
6.6 Replacement of the Mechanical Seal
a) Refer to Section 8 - Pump Section Drawing.
b) Drain and flush the seal oil chamber.
c) Remove the priming sump and any priming
equipment obstructing access to the suction
side of the pump.
d) Remove the 16 screws B30 from the
suction cover B50 and withdraw the cover.
e) Remove the plastic cap C40 from the centre
of impeller C10 and remove the impeller
retaining screw C30 and washer C20.
f) Using a soft faced mallet tap the impeller to
free it from the shaft taper. If the impeller is
tight then the thread in the centre of the
impeller can be used to jack the impeller
free. Withdraw the impeller using suitable
lifting equipment.
g) Push the seal retaining washer E30 along
the shaft by approximately 2mm to allow the
retaining ring E20 to be removed using a
small screwdriver. Withdraw the retaining
washer and the rotating seal assembly E10
from the shaft F10.
h) Undo the three small screws E50 and
remove the seal retaining plate E40.
Remove the static part of the seal E10,
ensuring that no carbon flakes or chips
remain.
i) Wipe the seal recess clean, lubricate the ‘O’
ring with a light smear of seal lubricating oil.
Insert the replacement static seal ring in the
back wear plate D10, ensuring that the anti-
rotation pin is engaged, and clamp in place
with the seal retaining plate E40.
j) Lubricate the inside of the rotating seal
assembly E10 and the shaft with soapy
water, DO NOT USE OIL OR GREASE.
k) Push the new rotating seal assembly E10
and retaining washer E30 down the shaft to
just past the retaining ring groove. Fit the
retaining ring E20 and pull the rotating seal
assembly and retaining washer back up
against the retaining ring.
l) Re-fit the impeller key F100, impeller C10,
washer C20 and screw C30. Torque screw
to 293Nm and refit the plastic cap C40
m) Re-fit the suction cover B50.
n) Fill the seal oil chamber with new oil.
6.7 Disassembly of the Pump
Refer to Section 8 - Pump Section Drawing.
The pump is designed to allow removal of
the bearing housing, shaft and impeller
assembly
without disconnecting the
pipework. If the pump is fitted with a spacer
coupling, the driver need not be removed.
a) Removal of the Rotating Assembly
Disconnect the drive coupling as per the
coupling manufacturer’s instructions, and
either remove the pump complete from the
baseplate or move the driver or spacer
coupling to allow withdrawal of the rotating
assembly without de-mounting the pump
volute casing.
Remove any priming system drive pulleys,
brackets, guards or engine mounting
adaptors or pump supports etc. to give free
access to the drive end of the pump.
Drain the oil from the bearing housing by
removal of the drain plug A180.
Support the bearing housing assembly and
ensure that suitable lifting facilities are
available. (The Rotating Assembly weighs
approximately 200kgs)
Remove the 16 screws B30 from the volute